Broadband low-profile dual-linearly polarized antenna for a OneLTE two-in-one platform

Abstract

A broadband low-profile dual-linearly polarized antenna for a OneLTE two-in-one platform and an antenna array device formed therefrom are provided that can realize low-profile and ultra-broadband and have such advantages as simple structure, neat appearance, easy engineering implementation, and suitability for mass production. The broadband low-profile dual-linearly polarized antenna can include (1) a radiating portion that can include a dielectric substrate, printed folded dipoles spaced apart on an upper surface of the dielectric substrate, first coupled parasitic elements on a lower surface of the dielectric substrate, and second coupled parasitic elements on the upper surface of the dielectric substrate and (2) a feed balun for feeding the radiating portion, wherein each of the printed folded dipoles can include a corresponding one of the first coupled parasitic elements and a corresponding one of the second coupled parasitic elements.

What is claimed is: 
     
       1. A broadband low-profile dual-linearly polarized antenna comprising:
 a radiating portion, wherein the radiating portion comprises a dielectric substrate, four printed folded dipoles spaced apart on an upper surface of the dielectric substrate, first coupled parasitic elements on a lower surface of the dielectric substrate, and second coupled parasitic elements on the upper surface of the dielectric substrate; and 
 a feed balun for feeding the radiating portion, 
 wherein each of the four printed folded dipoles includes a respective corresponding one of the first coupled parasitic elements and a respective corresponding one of the second coupled parasitic elements, 
 wherein each of the first coupled parasitic elements is located between respective adjacent ones of the four printed folded dipoles, and 
 wherein each of the second coupled parasitic elements is placed adjacent to respective neighboring portions of respective outer edges of the respective adjacent ones of the four printed folded dipoles. 
 
     
     
       2. The broadband low-profile dual-linearly polarized antenna according to  claim 1 , wherein each of the four printed folded dipoles has a respective T-shaped match. 
     
     
       3. The broadband low-profile dual-linearly polarized antenna according to  claim 2 , wherein the first coupled parasitic elements are generally shaped as Unicode hex character 250C, Unicode hex character 2510, Unicode hex character 2514, and Unicode hex character 2518, and wherein each of the first coupled parasitic elements includes a respective notch facing inward. 
     
     
       4. The broadband low-profile dual-linearly polarized antenna according to  claim 3 , wherein each of the first coupled parasitic elements is located inside of respective outer contours of the respective adjacent ones of the four printed folded dipoles. 
     
     
       5. The broadband low-profile dual-linearly polarized antenna according to  claim 2 , wherein each of the second coupled parasitic elements includes two respective rectangular strips that need not be electrically connected. 
     
     
       6. The broadband low-profile dual-linearly polarized antenna according to  claim 1 , wherein the feed balun comprises two orthogonal baluns, and wherein each of the two orthogonal baluns is substantially shaped as Unicode hex character 220F. 
     
     
       7. The broadband low-profile dual-linearly polarized antenna according to  claim 1 , wherein the feed balun feeds the radiating portion in a manner of coupled feed. 
     
     
       8. The broadband low-profile dual-linearly polarized antenna according to  claim 1 , wherein the four printed folded dipoles are placed at equal or unequal intervals. 
     
     
       9. The broadband low-profile dual-linearly polarized antenna according to  claim 8 , wherein the four printed folded dipoles are placed at the equal intervals of 90 degrees. 
     
     
       10. The broadband low-profiled dual-linearly polarized antenna according to  claim 1 , wherein the radiating portion is rectangular. 
     
     
       11. A broadband low-profile dual-linearly polarized antenna array device comprising:
 a plurality of dual-linearly polarized antennas, wherein each of the plurality of dual-linearly polarized antennas includes the broadband low-profile dual-linearly polarized antenna of  claim 1 ; 
 a feed network comprising a power divider for feeding the plurality of dual-linearly polarized antennas in equal amplitude and in same phase, wherein the feed network has two feed ports for respectively exciting two polarization modes of ±45° to feed each of the plurality of dual-linearly polarized antenna through the power divider; and 
 a bottom metal reflector. 
 
     
     
       12. The broadband low-profile dual-linearly polarized antenna array device according to  claim 11 , wherein the plurality of dual-linearly polarized antennas has a number of two, and wherein the power divider is a one-to-two power divider. 
     
     
       13. The broadband low-profile dual-linearly polarization antenna array device according to  claim 11 , wherein the bottom metal reflector includes a metal flange.